/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */
#ifndef FLINK_TNEL_CHECKPOINTSTREAMFACTORY_H
#define FLINK_TNEL_CHECKPOINTSTREAMFACTORY_H
#include <vector>
#include <stdexcept>
#include "StreamStateHandle.h"

enum class CheckpointedStateScope {
    EXCLUSIVE,
    SHARED
};

class FSDataOutputStream {
public:
    virtual long GetPos() = 0;
    virtual void Flush() = 0;
    virtual void Sync() = 0;
    virtual void Close() = 0;
    virtual ~FSDataOutputStream() = default;
};

class CheckpointStateOutputStream : public FSDataOutputStream {
public:
    virtual StreamStateHandle *CloseAndGetHandle() = 0;
    void Close() override = 0;
};

class CheckpointStreamFactory {
public:
    virtual ~CheckpointStreamFactory() = default;

    virtual CheckpointStateOutputStream *
    createCheckpointStateOutputStream(CheckpointedStateScope scope) = 0;

    virtual bool canFastDuplicate(
        StreamStateHandle *stateHandle,
        CheckpointedStateScope scope) = 0;

    virtual std::vector<std::shared_ptr<StreamStateHandle>>
    duplicate(std::vector<StreamStateHandle *> &stateHandles,
              CheckpointedStateScope scope) = 0;
};

#endif // FLINK_TNEL_CHECKPOINTSTREAMFACTORY_H
